"""Tests for the AllPages + SiteMap enumeration views (SHARD-WP-0010 T4)."""

from shard_wiki.adapters import FolderAdapter
from shard_wiki.coordination import DecisionLog, EventType
from shard_wiki.model import Identity
from shard_wiki.union import UnionGraph
from shard_wiki.views import all_pages, site_map


def _shard(tmp_path, name, files):
    root = tmp_path / name
    for rel, text in files.items():
        p = root / rel
        p.parent.mkdir(parents=True, exist_ok=True)
        p.write_text(text, encoding="utf-8")
    return FolderAdapter(name, root)


def test_all_pages_spans_shards(tmp_path):
    u = UnionGraph("space")
    u.attach(_shard(tmp_path, "shardA", {"A.md": "a"}))
    u.attach(_shard(tmp_path, "shardB", {"B.md": "b"}))
    names = {e.name for e in all_pages(u)}
    assert names == {"A", "B"}


def test_chorus_collapses_to_one_entry_with_divergence(tmp_path):
    u = UnionGraph("space")
    u.attach(_shard(tmp_path, "shardA", {"Home.md": "A home"}))
    u.attach(_shard(tmp_path, "shardB", {"Home.md": "B home"}))
    entries = all_pages(u)
    home = [e for e in entries if e.name == "Home"]
    assert len(home) == 1  # chorus → single entry
    assert set(home[0].members) == {Identity("shardA", "Home"), Identity("shardB", "Home")}
    assert home[0].diverges is True  # bodies differ — collapse acknowledged, not silent


def test_chorus_same_body_does_not_diverge(tmp_path):
    u = UnionGraph("space")
    u.attach(_shard(tmp_path, "shardA", {"Home.md": "same"}))
    u.attach(_shard(tmp_path, "shardB", {"Home.md": "same"}))
    (home,) = [e for e in all_pages(u) if e.name == "Home"]
    assert home.diverges is False


def test_equivalence_binding_collapses_distinct_keys(tmp_path):
    log = DecisionLog()
    log.append(
        "space", EventType.BINDING_MADE, {"members": ["shardA:Foo", "shardB:Bar"]}
    )
    u = UnionGraph("space", log=log)
    u.attach(_shard(tmp_path, "shardA", {"Foo.md": "x"}))
    u.attach(_shard(tmp_path, "shardB", {"Bar.md": "x"}))
    pair = {Identity("shardA", "Foo"), Identity("shardB", "Bar")}
    # The two bound identities fold into one entry (named by the min key, "Bar").
    bound = [e for e in all_pages(u) if {*e.members} == pair]
    assert len(bound) == 1
    assert bound[0].name == "Bar"


def test_sitemap_reflects_namespace_paths(tmp_path):
    u = UnionGraph("space")
    u.attach(
        _shard(
            tmp_path,
            "shardA",
            {"Home.md": "h", "docs/Guide.md": "g", "docs/api/Ref.md": "r"},
        )
    )
    root = site_map(u)
    # Top level: "Home" page directly, and a "docs" namespace.
    assert any(p.key == "Home" for p in root.pages)
    docs = next(c for c in root.children if c.name == "docs")
    assert any(p.key == "docs/Guide" for p in docs.pages)
    api = next(c for c in docs.children if c.name == "api")
    assert any(p.key == "docs/api/Ref" for p in api.pages)